For water lines, drains, air compressors and faucets, Teflon tape works very well, as long as it's installed properly by wrapping the threads in the direction they will turn while joining. It's clean, non-messy and simple to use. Pipe dope, on the other hand, is messy, but it's be...
The correct answer is to use pipe dope the Teflon tape over the pipe dope. Teflon tape is not a sealant of any sort is only a thread lubricant. A true pipe thread sealer is pipe dope. As I just asked a sprinkler fitter why he was pipe doping then Teflon taping all pipe threads and...